diff --git a/go/src/v.io/x/playground/builder/builder_v23_test.go b/go/src/v.io/x/playground/builder/builder_v23_test.go
index ff99b03..88bce9b 100644
--- a/go/src/v.io/x/playground/builder/builder_v23_test.go
+++ b/go/src/v.io/x/playground/builder/builder_v23_test.go
@@ -11,7 +11,7 @@
 	"testing"
 
 	"v.io/x/playground/lib/bundle/bundler"
-	_ "v.io/x/ref/runtime/factories/generic"
+	_ "v.io/x/ref/runtime/factories/roaming"
 	tu "v.io/x/ref/test/testutil"
 	"v.io/x/ref/test/v23test"
 )
diff --git a/go/src/v.io/x/playground/bundles/fortune/src/client/client.go b/go/src/v.io/x/playground/bundles/fortune/src/client/client.go
index 4cef015..42a8e0d 100644
--- a/go/src/v.io/x/playground/bundles/fortune/src/client/client.go
+++ b/go/src/v.io/x/playground/bundles/fortune/src/client/client.go
@@ -14,7 +14,7 @@
 
 	"v.io/v23"
 	"v.io/v23/context"
-	_ "v.io/x/ref/runtime/factories/generic"
+	_ "v.io/x/ref/runtime/factories/roaming"
 
 	"fortune"
 )
diff --git a/go/src/v.io/x/playground/bundles/fortune/src/server/server.go b/go/src/v.io/x/playground/bundles/fortune/src/server/server.go
index 7024e30..2ae9896 100644
--- a/go/src/v.io/x/playground/bundles/fortune/src/server/server.go
+++ b/go/src/v.io/x/playground/bundles/fortune/src/server/server.go
@@ -17,7 +17,7 @@
 	"v.io/x/lib/vlog"
 	"v.io/x/ref/lib/security/securityflag"
 	"v.io/x/ref/lib/signals"
-	_ "v.io/x/ref/runtime/factories/generic"
+	_ "v.io/x/ref/runtime/factories/roaming"
 
 	"fortune"
 )
@@ -62,6 +62,20 @@
 	ctx, shutdown := v23.Init()
 	defer shutdown()
 
+	// TODO(ivanpi): The playground executor should somehow force the
+	// ListenSpec to be this way.
+	// When a ListenSpec is not explicitly specified, the "roaming" runtime
+	// factory sets it up to be the public IP address of the virtual
+	// machine running on Google Compute Engine or Amazon Web Services.
+	// Normally, the playground should execute code inside a docker image,
+	// but in tests it is run on the host machine and having this test
+	// service exported on a public IP (when running on GCE) is not an
+	// intent.  Furthermore, the test may fail if the firewall rules block
+	// access to the selected port on the public IP.
+	ctx = v23.WithListenSpec(ctx, rpc.ListenSpec{
+		Addrs: rpc.ListenAddrs{{"tcp", "127.0.0.1:0"}},
+	})
+
 	// Create the fortune server stub.
 	fortuneServer := fortune.FortuneServer(newFortuned())
 
diff --git a/go/src/v.io/x/playground/testdata/src/ping/ping.go b/go/src/v.io/x/playground/testdata/src/ping/ping.go
index abdb005..935bd8d 100644
--- a/go/src/v.io/x/playground/testdata/src/ping/ping.go
+++ b/go/src/v.io/x/playground/testdata/src/ping/ping.go
@@ -10,7 +10,7 @@
 	"fmt"
 
 	"v.io/x/lib/vlog"
-	_ "v.io/x/ref/runtime/factories/generic"
+	_ "v.io/x/ref/runtime/factories/roaming"
 	"v.io/x/ref/test"
 
 	"pingpong"
diff --git a/go/src/v.io/x/playground/testdata/src/pong/pong.go b/go/src/v.io/x/playground/testdata/src/pong/pong.go
index b00e92c..9dc7ccc 100644
--- a/go/src/v.io/x/playground/testdata/src/pong/pong.go
+++ b/go/src/v.io/x/playground/testdata/src/pong/pong.go
@@ -15,7 +15,7 @@
 	"v.io/v23/security"
 	"v.io/x/lib/vlog"
 	"v.io/x/ref/lib/signals"
-	_ "v.io/x/ref/runtime/factories/generic"
+	_ "v.io/x/ref/runtime/factories/roaming"
 	"v.io/x/ref/test"
 
 	"pingpong"